(RS)-2-Amino-9-(2,3-dihydroxy-propoxymethyl)-1,9-dihydro-purin-6-one (as per USP);2-Amino-9-[[(2RS)-2,3-dihydroxypropoxy]methyl]-1,9-dihydro-6H-purin-6-one ;Ganciclovir USP Related Compound A ; Iso Ganciclovir;